ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi AllI have been thinking about how to fix the broken pixel in the BL5000 display. Last week I found 2 BL5000 in very bad shape, however, the display was working, but with the usual pixel errors. I decided to find out if it was the display, or the connection from PCB to LCD that is the problem, and in the 2 displays I have, it is the connection via the white ribbon that is broken... It is the carbon traces that crack over time and cause the pixel errors, NOT the display itself..Found this guy : http://www.instructables.com/id/How-to-remove-and-re-attach-LCD-Ribbon-from-a-PCB-/What he is doing is just what I would like to do, however I need to attach the new ribbon to both PCB and LCD.
So I decided to try some tests, and it is only the connection that was the problem, I could actually get the display working 100% without any pixel errors by folding and stretching the ribbon at different angels..
Now all I need is to figure out if it is possible to buy the ribbon somewhere, it could be wider, however just need to find a ribbon with the correct spacing..
Anyone have some input on where and if it possible to get a hold of these ribbons ?
Here is a picture of the ribbon detached from the LCD
And the ribbon removed from PCB
And the display cleaned from the glue from the old ribbon. Before I removed the ribbon from the PCB, I tried to just hold it against the cleaned display, and it works, however it impossible to get connection on all points, but there was life in the display :)
/Weebyx
Great! There would be lots of people interested in a solution!
If you have a small tip and a surgeon's hand, maybe you could solder it...
Wouter
As engineer I've been thinking on it...
Why not making a strong small clip over it ?... (bended over both sides and if it is metall, you've to shield it with something)
BayernTechnik: As engineer I've been thinking on it... Why not making a strong small clip over it ?... (bended over both sides and if it is metall, you've to shield it with something)
Unfortunatelly there is no space for that, it needs to be glued to the glass and PCB. On the PCB it is possible to solder small wires, but how to attach them to the glass ? Maybe it is possible to use conductive glue ? Hmm, just thought of that :) Need to try it out..
Man kann es genauso reparieren wie die Displays aus der D-Box. Mit einem Bügeleisen. Einfach die Kontaktfolie wieder anbügeln, sie ist mit einem Schmelzkleber angeklebt.
Solange das Kabel nicht vollständig abgerissen wurde und nur einzelne Pixel fehlen, kann man es damit "optimieren". Völlige Fehlerfreiheit danach ist trotzdem schwierig, da auch die Graphit Seele des Kabels beschädigt sein kann ... und nicht nur abgelöst.
Hallo-
ich möchte gerne wissen ob der Versuch das Beolink 5000 wieder zu beleben erfolgreich war. Ich habe ein gut erhaltenes Beolink 5000, leider fangen die Pixelfehler auch bei mir an. Ich denke die Ribbon-Kabel und LCD sind i.O. und dass es sehr wahrscheinlich ein Wackelkontakt ist. Wenn ich die Fernbedienung auf einer warmen Fläche lege, z.B. mein Verstärker, gibt es eine Verbesserung.
not sure of language of this thread- I was curious to know if the effort was successful to restore the display on a Beolink 5000. I have a nice Beolink 5000 that is starting to show signs of pixel loss. I think the ribbon cable and LCD are working and that it's probably a bad contact. Sometimes laying the Beolink on a warm surface such as my amplifier helps.
Grüsse,
-Brian
Brian: Hallo- ich möchte gerne wissen ob der Versuch das Beolink 5000 wieder zu beleben erfolgreich war. Ich habe ein gut erhaltenes Beolink 5000, leider fangen die Pixelfehler auch bei mir an. Ich denke die Ribbon-Kabel und LCD sind i.O. und dass es sehr wahrscheinlich ein Wackelkontakt ist. Wenn ich die Fernbedienung auf einer warmen Fläche lege, z.B. mein Verstärker, gibt es eine Verbesserung. not sure of language of this thread- I was curious to know if the effort was successful to restore the display on a Beolink 5000. I have a nice Beolink 5000 that is starting to show signs of pixel loss. I think the ribbon cable and LCD are working and that it's probably a bad contact. Sometimes laying the Beolink on a warm surface such as my amplifier helps. Grüsse, -Brian
Hi Brian
I did not manage to get this fixed, the problem lies only in finding a new ribbon with the correct spacing betweeen the wires.. The PCB and glass is totally clean, and none of them has sny problems..
It's sad that this remote has to be discarded because of a small plastik ribbon. I have searched hi and low, and some calculators uses the same ribbon, but with not quite the same distance and widt of the wires..
if we could get hold of a ribbon that matches, it would be no problem to fix them :)
I did read this thread, and it seems possible to do.. but where do we find the new ribbons ? :)
http://www.instructables.com/id/How-to-remove-and-re-attach-LCD-Ribbon-from-a-PCB-/
Hi
I read your posting about the beolink cable issue, you won't be able to solder as the tracks are not copper they are a printed graphite that rely on surface bonding to the contacts it's very clever but way beyond home repairs Think Beosound 3 touch control panel that has a printed flex foil pcb which breaks down internally and is also unrepairable.
BUT there might be some help here if you can read the pitch accurately for the contacts, you need the number of tracks the width of the ribbon and the pitch ie distance between tracks. This company makes FFC to order and may even have your cable in stock. It is WWW.en.esskabel.de They translate to English maybe this might help you.
Regards Maurice
Hi Maurice,
I do not think that my Beolink needs a new ribbon cable. I think the problem is a weak solder joint. When I store my Beolink in a cold place, such as in my cellar in the winter, I lose about 80% of the pixels. I made this mistake once. Once the unit is warmed back to room temperature, most of the pixels return. The best fix so far has been to leave the Beolink on top of my Beomaster 7000 for a few hours, sometimes I get 100% of the pixels to work that way. But I don't know if this is causing more problems in the long term, so I do this sparingly.
The remote is in too nice of a condition to experiment with. I am more afraid of messing things up. But it would be nice if someone could professionally reflow the connectors. That would probably be enough to fix 90% of the Beolinks out there.
Brian: Hi Maurice, I do not think that my Beolink needs a new ribbon cable. I think the problem is a weak solder joint. When I store my Beolink in a cold place, such as in my cellar in the winter, I lose about 80% of the pixels. I made this mistake once. Once the unit is warmed back to room temperature, most of the pixels return. The best fix so far has been to leave the Beolink on top of my Beomaster 7000 for a few hours, sometimes I get 100% of the pixels to work that way. But I don't know if this is causing more problems in the long term, so I do this sparingly. The remote is in too nice of a condition to experiment with. I am more afraid of messing things up. But it would be nice if someone could professionally reflow the connectors. That would probably be enough to fix 90% of the Beolinks out there. -Brian
The ribbon cable is as said, made from carbon, and it goes over time.
The fix points on the display and PCB is by heatbonding "around" the carbon tracks, so in your case, the problem might be solved by re-heating the display and PCB side.. But don't !! I got hold of a BL5000 where half the pixels worked, I opened it, and the moment I touched the flex cable so it moved, the whole display just died almost instantly... the connections on both the display and PCB where fine, it was the middle part of the cable, where the "fold" is, that just crumbled..
I have opened my TI-68 calculator, and it has the same cable as then BL5000, and is is long enough, and with more connections.. unfortunatelly with a different pitch... But I will try to see if I can re-heat some of the contacts and see if something happens :)
Hi - thanks for the warning. I think I will just enjoy my Beolink 5000 as it is and hope it lasts.
Hey guys,
Found something intresting:
http://solutions.3m.com/wps/portal/3M/en_US/Electronics_NA/Electronics/Products/Electronics_Product_Catalog/~/3M-Electrically-Conductive-Adhesive-Transfer-Tape-9703?N=8704978+3294001720&rt=rud
I found a new hope… just have to transfer the signals with a fine pitch ribbon.
Will try to get a piece of this, and put directly the LCD to the panel to try it out!
Or anyone having time to attempt repair would nice to post it here!
Hadn't seen this thread before.
Regarding reflowing the old ribbon cable, it partially fixed mine (see here). At least it fixed it for a while.
Hi,
There are many treads about the Beolink 5000 and problems with the display.
The main problem is not the display, but the connection between the heat sealed carbon cable and the - either display or PCB connection. This is not so easy to solved, as the cable is sealed to the display and PCB by heating up the cable, as the cable had a glue acting by a high temperature.
This has after many years slipped. The display is not normally a problem - even though it look like the display as a row or column is missing - the problem is the cable. You can fix this - in some cases - if you add something (paper, rubber etc) - as a pressure when you close the cabinet again. But you must only add this where the cables has slipped - not easy but can be done.
Some discuss to solder the connections - don't do this, this will not work. Removing the cable and replace this - even with a brand new one - is not easy, as you must use the right temperatur, time and pressure to get a long life time again.
The best is of course to replace the PCB, cable and display - as they are in one - with another used one - but probable difficult to get now a days.
The pressure trick is the best
Best regards Rudi